OC-EXP2 Qualitative Tests for Organic Compounds

Which of the following elements are the most predominant in organic compounds?

• Carbon and oxygen

• Carbon and hydrogen

• Nitrogen and sulfur

• Phosphorus and halogens

What is the qualitative test used to detect carbon in organic compounds?

• Heating with copper (II) oxide

• Heating with lime water

• Heating with sulfuric acid

• Heating with sodium hydroxide

How is the presence of carbon dioxide indicated in the qualitative test?

• Formation of water droplets

• Formation of a white precipitate of calcium carbonate

• Formation of a blue color

• Formation of bubbles

Which element's presence is indicated by the formation of water droplets in the cool end of the tube?

• Oxygen

• Nitrogen

• Carbon

• Hydrogen

Which method can be used to detect the presence of oxygen in compounds?

• Heating with metallic sodium

• Using ferrox paper

• Heating with sulfuric acid

• Reacting with potassium hydroxide

What color does ferrox paper turn in the presence of oxygen-containing compounds?

• Blue

• Green

• Red

• Colorless

Which compound reacts to form a reddish-purple color in the presence of oxygen-containing compounds?

• Iron (III) ammonium sulfate

• Potassium thiocyanate

• Iron (III) hexathiocyanatoferrate (III)

• Iron (II) sulfate

How are nitrogen, halogens, and sulfur detected in organic compounds?

• By heating with metallic sodium

• By heating with sulfuric acid

• By heating with potassium hydroxide

• By heating with ammonia

What is used to convert nitrogen, halogens, and sulfur into inorganic ions for qualitative tests?

• Metallic sodium

• Sulfuric acid

• Potassium hydroxide

• Ammonia

Which element's presence is made difficult to detect due to the non-polar nature of organic compounds?

• Oxygen

• Nitrogen

• Hydrogen

• Carbon